Jeff Walden - Bug 853301 - Make a --with-intl-api/--with-intl-api=build/--without-intl-api configure option that builds/exposes Intl, only builds it, and doesn't build it at all. This will allow tests with the Intl code, built, but with no changes to JS behavior, permitting disentangling binary-size-increase effects from effects due to changes in JS functionality (or in code invoked to expose that functionality). r=glandium